Abstract
This article is focused on the development of a finite element model for capturing the fluid-structure interactions in a hybrid electro-hydraulic pump system. The system under study consists of a piezo-actuated piston and two passive poppet valves. A Finite Element Model has been developed which simulates the oscillatory fluid motion (compressible Navier-Stokes equations with standard k-e turbulence extensions) and incorporates an Arbitrary Lagrangian- Eulerian formulation to allow a deforming moving mesh. Through this moving mesh the fluid is capable of tracking the motion of the piston and valves, while a two-way interaction is applied to the surrounding rigid structure. The fluid pressure profile surrounding the solid regions is applied as a force load to the solid and the solid motion is transferred to the fluid domain as a mesh deformation. The simulation results offer useful insight on the pump's performance caused by changes in the: a) valves' spring stiffness and mass, and b) piston's operating frequency. A careful parametric optimization on certain pump's parameters yields a twofold increase in its performance at high frequencies (500 Hz).
Original language | English (US) |
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Pages (from-to) | 71-78 |
Number of pages | 8 |
Journal | International Review of Mechanical Engineering |
Volume | 4 |
Issue number | 1 |
State | Published - Jan 2010 |
Keywords
- Finite element model
- High frequency pump
- Optimization
- Poppet valve
ASJC Scopus subject areas
- Mechanical Engineering